Device for the lateral maintenance of the lifting rods of forging hammers to prevent their distortion



Sept. 14 1926.

BUGATTI DEVICE FOR THE LATERAL MAINTENANCE OF THE LIFTING ,RODSf OFFORGING HAMMERS TO PREVENT THEIR DIS'IORTIQN Filed March 15, 1926 mammmm -M wjwfli Patented Sept. 14, 1926.

UNITED STATES PATENT OFFICE.

ETTORE BUGATTI, OF MOLSHEIM, FRANCE.

DEVICE FOR THE LATERAL MAINTENANCE OF THE LIFTING nons or ,FORGINGHAMMERS To PREVENT THEIR DISTORTION. I

Application filed March 15, 1926, Serial No. 94,925, and. in FranceMarch 16, 1925.

It has hitherto proved impossible to utilize rods of small diameter forraising the falling weight in forging or stamping ham mers. In fact, byreason of the great length which must be given to such rods, the rodwill be subject to. distortion during the descent of the weight and thevibrations must be allowed to cease before the said weight can be againlifted.

The present invention will obviate this defect, and it consists in theuse of a certain number of boards or plates of wood or oth er materialwhich are threaded loosely upon the rod of the hammer and are guided bythe vertical guiding members of the falling weight, said plates beingspaced along the whole height representing the stroke of the saidweight, so as to prevent all jarring of the rod by bearing laterallyagainst the said guiding members.

The following description, with reference to the appended drawings whichare given by way of example, show the manner in which the said inventionis carried into efr fect.

Fig. 1 is an elevational view of the hammer, the object of theinvention.

Figs. 2 and 3 are sections respectively on the lines XX and Y-Y of Fig.1.

As observed in the drawings, the falling weight or block a is guided inthe known manner between the two guiding members 6 and b whereof oneside is cut at an angle and thus engages in a recess of correspondingform in the block a. This latter is raised by means of a rod 0 of smalldiameter.

To prevent the said rod from jarring, the plates (Z (Z which are two innumber in the drawings, but which may be employed in any suitable numberaccording to the height of the apparatus, are disposed upon the rod 0and are suitably apertured for this purpose at e.

The said plates, as shown in Figs. 2 and 3, are guided during thedescent by the guiding members 6 b of the weight. The plates rest uponsuitable tappets, f for the plate (Z and f for the plate (Z which aremounted on the respective guiding members 6 and 6 The said tappets havea suitable size in order to afford free passage for the plate situatedunderneath, as will be observed by comparing Figs. 2 and 3. By thisarrangement, when the weight falls, the plate (Z may descend withoutbeing arrested by the tappets f whilst it will be arrested by thetappets 7. Obviously, if a certain number of such plates are employed,their length will dimmish as they come nearer the weight a.

During the ascent of the weight a, the said plates are drawn upwardly bymeans of the studs (I mounted on the weight, and will be piled up insuccession on the said weight. When the weight falls, they will descendwith it, each being arrested in turn by the corresponding tappet, asshown in Fig. 1. In these conditions, when the weight is at the end ofits stroke, the plates will be properly distributed along the rod 0 andwill prevent all vibrations of the said rod at the time of the impact.

Obviously, without departing from the principle of the invention, it issusceptible of various modifications in detail, and in particular, theinvention is applicable to like devices assuring the lateral maintenanceof the rod, at different points on its height, when the weight is at theend of its stroke, while allowing the said rod to move freely in thevertical direction,

lVhat I claim is 1. A device for the lateral maintenance of the rods ofsmall diameter serving to lift the falling weight in forging andstamping hammers, said device comprising suitable plates which arethreaded upon the rod of small diameter and are guided between thevertical guiding members which serve to guide the said falling weight,means being provided to arrest the respective plates at difierentheights, whereby they will be suitably spaced along the heightcorresponding to the stroke of the said weight when the latter is at thebottom of the stroke.

2. A device for the lateral maintenance of the rods of small diameterserving to lift the falling weight in forging and stamping hammers, saiddevice comprising suitable plates which are threaded upon the rod ofsmall diameter and are guided between the vertical guiding members whichserve to guide the said falling weight, tappets being distributedthroughout the height representing the stroke of the said falling weightand. adapted to arrest the said plates at different heights during thedescent of the mass.

3. A device for the lateral maintenance of the rods of small diameterserving to lift the falling weight in forging and stamping hammers, saiddevice comprising suitable plates which are threaded upon the rod ofsmall diameter and are guided between the vertical guiding members Whichserve to guide the said falling Weight, tappets being distributedthroughout the height representing the stroke of the said falling Weightand adapted to arrest the said plates at different heights during thedescent of the mass, means being provided to enable any given plate topass 10 freely between the tappets situated above the tappet whichserves to arrest the said plate.

ln testimony whereof I have signed this specification.

ETTORE BUGATTI.

